#include <stdio.h>
void main()
{
    int n1,nm,i,j,flag,count=0;
    do{
        printf("Input START and END=?");
        scanf("%d%d",&n1,&nm);
      }while(! (n1>0 && n1<nm));
      printf("-------------------PRIME TABLE(%d - %d)--------------\n",n1,nm);
      if(n1==1 || n1==2){
        printf(" %4d",2);
        n1=3;count++;
      }
      for(i=n1;i<=nm;i++){
        if(! (i%2))continue;
        for(flag=1,j=3;flag&&j<i/2;j+=2)
        if(! (i%j))flag=0;
        if(flag)printf(++count%15?"%4d":"%4d\n",i);
      }
}